Plant-sville



0, W. screw, or'PLANT-SV1LLE,.CONNECTICUT.

'Leners Patent No. 75,487, dateert/[mt 1o, 1868.

IMPROVED MAHINE POR FORMING TBULA-R BEADS-ON' SHEET-METAL GUTTBRS.

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TO ALL WHOMiIT MAY CONGERN: v

Be it known that I, W. STOW, of P1antsville,in,the county ofHartford,and State of Connecticut, have invented a. new and improvedMachine for Forming Beads on Sheet-Metal Gutters for Roofs; and I dohereby declare that the following is o full, clear, and exactdescription thereof, which will enaible others skilled 4in the art tomake and use the same, reference being hed to the accompanying drawings,forming part of this specification, in which- Figure 1 is a front Viewof my invention.

Figures 2 and 3, transverse' vertical sections of the saine, taken inthe line a: x, fig. 1. Figure 4, a transverse section of a gutter, drawnwith a view of showing the bead formed by my invention.. Similar lettersof reference indicate like parts. l Sheet-metal gutters for roofs areconstructed of thin metal plates, (most generally tinnedsheet iron,)bent yin semicircular shape, withfa, tubular bead formed on theouteredge, in order to stitl'en the-gutter :md keep it in proper shape.

My invention relates to a. new and improved ina-chine for forming thetubular beads on the' edges ofthe sheet-metal plates and it consists inthe peculiar operation of the cam-lever, in combination with thepivotedjaws, by means of. which the jaws are closed before forming the bead.

A A represent two'standarcls or uprights, connected by n, cross-piece,B, at their-upper ends, the standards and cross-piece being all cest inone piece.v The standards are secured-by bolts to e suitable base, 0*,and the lower edge of the cross-piece B has pendent ears, let, to serveas supports or bearings for a horizontal rod, C,

Athe e'nds of which poss through the standards A A. D` D represent twojews, which extend the whole length of the machine, and are providedwith pendent erms, E, onenear en'ch end, seid arms extending down nearlyto the bnse,-0*. These jews ynre of curved form transversely, the lowerparts, Z1, being a portion of a. hollow cylinder, of such dimensionsthat they moy enclose the cross-piece B of the standards A, the upper(parts, c, being a. portion of a. smaller cylinder, and above saidcross-piece, as shown in igs. 1 und 3. The rod passes through the arms Eof these jews, the former servingns n. fnlcrum for the latter, andbetween the lower parts of the Varms E ofthe two jews, a, Lcom-shaft, F,is fitted, said shaft having its bearing in the standards A A. l

This cam-shaft is provided with a lever or treedle, G. H representssprings, two or more, of spiral form, und placed between the lowerlports, b, of the jaws. These springs pass through openings in thecross-piece B, and they have a tendency to keep the jews D D distendedor forced apart.' I is a. metnl shaft or arbor,rthe diameter of whichcorrosponds'to the internal diameter of the bend to be bent er formedinthe sheet-metal plates. This shaft or arbor is bent at one' end, toform a. crank, J, and it has a. groove', e, made longitudinally in it,and extending its whole length. v

lhc device isised as follows: The shaft or'urbor is placed between theupper parts,rc c, to enclose the shaft or arbor. The edge of thesheet-nietal plete is then inserted in the groove of the shaftorurbor,the upper edges ,of c c not coveringit, and the shaft ler arbor isthen turned one revolution, and the tubular bead thereby formed on theplate,(seeriig. 3.) The trendle or lever is thenrelensd, andthe springs.H force apart thejnw's, and the shnft or arbor, with-the edge of theplate wound upon it,lifted loutfrom between the parts c c of the jews,und the shaft or arbor then drawn out from ythe tubulonprejeotion. e v

The device, it will beseen, is extremely simple, very compact, and maybe manufactured at a smell cost,

the parts being all ofczist iron, with the exception of the. shaft C andthe shaft or arbor 1'., and put together without any troubler ordifficulty whatever. They inner surfaces of the upper parts c c ofthejaws are milled out, in order to render them true or smooth, Iend thatis the only after-work required, with the exception of i putting theparts together.

I claim as new, and desire to secure by Letters Potent-- The combinationof the ccm-lever F G with the pivoted jews D D,wh'ereby the jaws ereclosed-to .form the bead, substantially es described for the purposespecified.

. 0. W. STOW.

Witnesses:

W. R. WALKLEY, STEPHEN WALKLEY.

